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《Sichuan Journal of Zoology》 2006-04
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Phylogeny of Libellulidae Based on Mitochondrial Cytochrome b Nucleotide Sequences (Odonata∶Anisoptera)

ZHANG Da-zhi~(1,2),DAI Jin-xia~1,ZHENG Zhe-min~2(1.School of Life Science,Ningxia University,Yinchuan 750021;2.School of Life Science,Shaanxi Normal University)  
In this study,fragments of mitochondrial DNA cytochrome b gene(each 576 base pairs in length) have been characterized from twenty individuals belong to 9 species from 6 genera of Libellulidae in China.These sequences were parts of Cyt b gene of mtDNA,and in the obtained sequences,A%+T% was about 69.2%.From every amino acid codon,A%+T% in the third site was higher(86.5%) than the other two sites.The sequence data revealed considerable variation in 216 nucleotide sites(about 37.5%) among the analyzed individuals from 6 genera.We obtained homologous nuclear sequence of Megalestes maai(damselfly) for outgroup.The phylogenetic trees were constructed with neighbor-joining method,maximum likelihood method and maximum parsimony method.The confidence of nodes in the trees was evaluated by 1000 replicates bootstrap.The phylogenetic relationship of mitochondrial DNA suggested that the Libellulidae was a monophyletic group.Orthetrum was more evolutional than other genera.The phylogenetic relationships of the 6 genera was: Paniala and Sympelrum→ Lyriothemis →Acisoma and Crocothemis →Orthelrum.
【Fund】: 宁夏大学自然科学基金资助项目(NS0511)
【CateGory Index】: Q961
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